IBM H8 user manual Msg buffer

HTEB1

User manual

keyReadIndex++;

if (keyReadIndex >= cKeyBufSize) keyReadIndex = 0; return KeyCode;

}

u8 buffer[17] = " KeyCode : 0000 \0"; // msg buffer

//convert int to ASCII-HEX void ShowCode(u16 code)

{

u8 *data, c;

data = &buffer[14];			// last digit = start address
while (code)
{
*data = '0';		// default = '0'
c = code & 0x000f;		// check digit
if (c)			// if > 0 chk for value
{
if (c < 10) *data = '0'+c;			// 0..9
else *data = 'A'+c-10;			// a..f
}
data--;			// next digit
code >>= 4;
}
LCDWriteLine(1,buffer);		// show result
}
void KeyTest(void)
{
u8 c;
u16 KeyCode;
PMR1 = cKEYCLK;	// P16 irq-input
PMR1 &= ~cKEYDATA;	// P17 i/o-pin
IEGR1 &= ~0x04;		// IRQ_2 on falling edge
IENR1 = 0x04;		// enable IRQ_2
set_interrupt_mask(0);	// enable all interrupts
LCDWriteLine(0, "PC-Keyboard-Test");
LCDWriteLine(1, "press any key...");
while (1)
{
if (kbhit())	// if new key ...
{
KeyCode = GetKey();		// get codes
ShowCode(KeyCode);		// display code
}
}
}
void main(void)
{
LCDInit();	// init ports and LCD
KeyTest();	// go to keyboard test
}

Issue 0.2 Page 47 07/2002